Note 4. Fair-Value Measurements Financial Assets Measured at Fair Value on a Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Cash equivalents	$ 412,388	$ 441,199
Marketable securities	3,285
Level 1 [Member]
Cash equivalents	79,092	99,092
Marketable securities	0
Level 2 [Member]
Cash equivalents	333,296	342,107
Marketable securities	3,285
Level 3 [Member]
Cash equivalents	0	0
Marketable securities	$ 0